"Income inequality in Japan is above the OECD average and increased since the mid-1980s, as in the majority of OECD countries. In 2009, the average income of the top 10% of Japanese was 10.7 times that of the bottom 10%, up from a ratio of 8 to 1 in the mid-1990s and 7 to 1 in the mid-1980s. This compares to an OECD average of 9.6 to 1 in 2013."